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The large-scale theft took place across a 10-month period up to June this year, with about £10,000 lost from the site at Braes of Doune, near Comrie.

It is thought the theft was carried out in small stints making it unclear to passers-by.

A Police Scotland statement said: “The sheep are blackface ewes and hoggs, all with EID identification chips in their ear tags, which are marked with the number UK0543847, and all have ear clips of a half-moon shape at the front top of both ears, which is unique to their home farm.”

Despite an extensive area of farmland making the thefts potentially unnoticeable, police said it was possible local farmers could have spotted the animals being offered for sale.

Anyone with information is urged to contact Tayside Division on 101, quoting CR/20879/17 or speak to any police officer. Information can also be passed on anonymously through Crimestoppers on 0800 555 111.